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This is a relatively well-researched list: http://www.drawdown.org/solutions-summary-by-rank http://www.drawdown.org/solutions-summary-by-rank

• timb07 9y ago
  That's a list of the potential reduction in emissions various solutions offer. You'd need to add together all the solutions relating to electricity generation (for example) to determine the impact of electricity generation as a whole. (And that's assuming that the listed solutions combined will address the whole of the problem, which I doubt.)
• aoner 9y ago
  I don't really agree with the proposed list. It is listed based on the reduction certain solutions could potentially offer, but the limits of the reductions they offer are not correct. So for example, the impact of cement is way higher but their proposed solution isn't carbon negative or carbon neutral concrete but just a reduction in the carbon footprint. So if they were optimistic about the outcome, the order in the list would greatly changed.
  • yungchin 9y ago
    They limit themselves to only those solutions which have been vetted by the scientific process, and that could be readily implemented with currently available technology. In a way you're right that that's not an optimistic take, but in another way there's a lot of optimism there: they show that adding up the impacts of only that limited set of solutions could already achieve drawdown!